Thanks mrsellout for reply. this is not an issue about programm that opens the doc file but the fonts than doesn't show up.
Let me discribe a bit :-
Suppose you create a word file with MS Office 2007 to use as a dictionary or to raise your vocabulary collection (As I did). Then you put some words which are in English fonts and put their meanings which are in Bangla fonts (As I am a Bangladeshi). Then you put the file into your n900 (DTG Premier Installed). Then you open the file with file manager and the file does open with word to go. The English fonts shown up but the Bangla fonts shows as boxes instead of font. So thats my problem. I need a hand to get rid of the problem. Does anybody have a hand ???